I started putting rv anti freeze in the water system of the 8316 and in my depression of knowing we won't be camping until next spring I forgot to shut the water heater bypass, after reading up on all the step and tips here I stil don't know how I did that. Anyway about 2 gallons went in system before I said a bad word. I took rod out and draind tank. Do I need to hook up the city water system and start again or will just draining and flushing well in the spring be ok?

Just draining the wh tank should be sufficient. Any antifreeze left over won't hurt the wh tank. It's the anode rod that doesn't like antifreeze so make sure and wash it off well. In the spring you may want to do as suggested above and flush it with fresh water, but it will be just fine until then.